Global Patent Index - EP 0788558 B1

EP 0788558 B1 19990210 - METHOD AND APPARATUS FOR ADDING ALUMINUM AND CALCIUM TO MOLTEN LEAD

Title (en)

METHOD AND APPARATUS FOR ADDING ALUMINUM AND CALCIUM TO MOLTEN LEAD

Title (de)

VERFAHREN UND VORRICHTUNG ZUM EINBRINGEN VON ALUMINIUM UND KALZIUM IN FLÜSSIGESBLEI

Title (fr)

PROCEDE ET APPAREIL PERMETTANT D'AJOUTER DE L'ALUMINIUM ET DU CALCIUM A DU PLOMB FONDU

Publication

EP 0788558 B1 19990210 (EN)

Application

EP 95931106 A 19950919

Priority

  • CA 9500525 W 19950919
  • CA 2132485 A 19940920

Abstract (en)

[origin: WO9609418A1] Process and apparatus for adding calcium and aluminum to molten lead to produce a lead-calcium alloy suitable for battery grids. Particles of calcium and aluminum metal or alloys thereof are fed into the interior of a tubular housing having a wall extending down into the molten lead and having a bottom opening at a relatively large depth below the lead surface and having openings in its wall at a relatively small depth below the lead surface. A rotary impeller which acts at least partially as a centrifugal impeller is positioned in the housing to cause swirling of lead carrying the particles within the housing, the shape of the housing and the nature and position of the impeller being such as to ensure that lead carrying the particles is swirled against the housing wall and recirculated within the housing before the lead leaves the housing.

IPC 1-7

C22C 1/02; B01F 3/12; B01F 7/16

IPC 8 full level

B01F 27/91 (2022.01); C22C 1/02 (2006.01); C22C 21/00 (2006.01)

CPC (source: EP)

B01F 23/511 (2022.01); B01F 27/91 (2022.01); C22C 1/02 (2013.01); B01F 27/15 (2022.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IE IT LI NL SE

DOCDB simple family (publication)

WO 9609418 A1 19960328; AT E176688 T1 19990215; AU 3467895 A 19960409; AU 687636 B2 19980226; BR 9508848 A 20020416; CZ 82697 A3 19971217; DE 69507831 D1 19990325; DE 69507831 T2 19990819; DK 0788558 T3 19990920; EP 0788558 A1 19970813; EP 0788558 B1 19990210; ES 2128759 T3 19990516; GR 3029968 T3 19990730; JP H10505880 A 19980609; NO 971138 D0 19970312; NO 971138 L 19970312; NZ 292491 A 19970624

DOCDB simple family (application)

CA 9500525 W 19950919; AT 95931106 T 19950919; AU 3467895 A 19950919; BR 9508848 A 19950919; CZ 82697 A 19950919; DE 69507831 T 19950919; DK 95931106 T 19950919; EP 95931106 A 19950919; ES 95931106 T 19950919; GR 990401047 T 19990416; JP 51047896 A 19950919; NO 971138 A 19970312; NZ 29249195 A 19950919